Utah's Great Salt Lake is the largest saltwater lake in the Western Hemisphere and the eighth-largest in the world. Located in northern Utah, it covers an area of about 1,700 square miles, although its size can vary significantly due to evaporation and seasonal changes. The lake is a remnant of the ancient Lake Bonneville, which existed during the last Ice Age. The Great Salt Lake is known for its high salinity, which makes it inhospitable for most fish but supports various microorganisms and brine shrimp. It is an important habitat for migratory birds, attracting species such as the American avocet and Wilson's phalarope. The lake also plays a significant role in the local ecosystem and economy, particularly in salt production.